Automatic boat bailer



May 8, 1928. 1,669,276

H. L. BALDWIN AUTOMATIC BOAT BAILER Filed March 8. 1926 flaw ZaZZ-Edda/an 6N0: new

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tially parallel. Thus in closing the valve, the edges 27 and 28 willserve to shear off any foreign-matter that might collect in the valvecasing and this will insure the complete closure of the valve.

In the operation of my device the movement of the boat forwardly throughthe wa-' ter causes the water to flow around the displacement member 6,thus creating a suction at the rear of the member suflicient to open thecheck valve 13. Any water which may have collected in the hull of theboat will therefore, be drawn through the ports and be ejected throughthe opening inthe rear of the displacement member. By providing theforwardly and upwardly curved surfaces on the displacement member thelatter offers a minimum amount of resistance to the water flowing pastthe same and by providing the reduced neck portion a greater amount ofsuction will be produced because of the fact that the water surrounds atleast 270 of the circumference of the body.

My improved construction is easy to install and simple to manufacturesince it com prises only a single main casting, the sleeve valve and thecheck valve. The broad flange formed integral with the main castingprovides a good bearing surface so that the device may be rigidlysecured to the boat and by employing a suitable gasket 31 the joint willbe entirely leak proof.

A suitable stop is preferably provided to limit the rotation of thesleeve valve to approximately one-fourth of a turn and asshown in Figure5, this comprises a screw 29 threadedly engaging the valve 18 andprojecting through a segmental slot 30 in the outer casing 17. With thisarrangement when the screw is at one end of the slot the valve is openand when at the other end the valve is closed.

What I claim as my invention is:

1. An automatic boat bailer comprising a hollow displacement memberadapted to be attached to the bottom of a boat, said displacement memberbeing stream lined longitudinally and having an opening at the rearthereof, a conduit connecting with said hollow member opening into thelower portion of the hull, an annular flange within said displacementmember, a flap valve hingedly connected to said displacement member andadapted to seat upon said flange within the outerwalls of said member,said valve being of substantially the same area asthe opening in therear of said displacement member.

2. An automatic boat b'ailer comprising a plate adapted to be attachedto thehull of a vessel, a hollow displacement member depending from saidplate andintegral therewith, said displacement member having its outersurface tapered forwardly and upwardly to impart a stream line contourthereto, the rear of said displacement member being open, an inwardlyprojecting annular flange forwardly spaced from the rear of saiddisplacement member, a gravity seated check valve hingedly mounted onsaid displacement member .to seat upon said annular flange, a verticaltubular housing integral with said plate adapted to project through thebottom of said vessel, said housing being laterally ported above thebottom of the vessel, a manually controlled valve rotatable in saidhousing and provided with lateral ports adapted to register with saidfirst mentioned ports.

3. An automatic boat bailer comprising a plate adapted to be attached tothe hull of a vessel, a displacement member depending from said plateand integral therewith, said displacementmember having its outer surfacetapered forwardly and upwardly to impart a stream line contour thereto,said displacement member also being hollow forming a single chambertherewithin, a tubular valve housing on the opposite side of said platefrom said displacement member and communicating with said chamber, anannular flange within said displacement member, a gravity seated checkvalve hingedly connected to said displacement member and adapted to seatupon said flange thereby forming a check to prevent the back flow ofwater into said chamber.

1-. An automatic boat bailer comprising a plate adapted to be fastenedto the bottom surface of a boat, a hollow displacement member dependingfrom said plate, the lower portion of said member being substantiallycircular in cross section and provided with an opening at the rearthereof, a contracted neck connecting said plate to said lower portionwhereby 'the latter has at least 270 of its circumference surrounded bywater, said displacement member being tapered forwardly and upwardlyforming a lower surface, the forward end of which merges into theforward end of said plate, a flap valve of an area substantially equalto the opening in said lower portion, said valve being hingedlyconnected to said neck portion to seat within said displacement member,a tubular casing projecting upwardly from said plate provided with portswithin the hull of said boat, and a manually operable sleeve valverotatable in said casing for closing and opening said ports.

5. An automatic boat bailer comprising a plate adapted to be attached tothe bottom of a boat, a stream lined displacement member depending fromsaid plate, a vertical tubular housing provided with a plurality ofvlateral openings projecting upwardly from said plate, the saiddisplacement member having an opening at the rear thereof and formingwith the vertical tubular housing a conduit extending from theexterior'to the interior of the boat, an annular flange but Within thedisplacement member adjacent the opening in the rear thereof, a flapvalve sleeve being supported by the said last mentioned flange and beingPIOVlClQQl'Witll a plurality of apertures adapted to be moved intoregistration with the apertures in the vertical tubular housing. y

(5. An automatic boat baller COJIlPl'lSlIlg a plate adapted to beattached to the bottom of a boat, a tubular housing carried by saidplate and projecting into the interior of the,

boat, a hollow displacement member depend ing from said plate having amouth registering with 'the tubular housing and an opening adjacent therear thereof, the said displacement member forming with the tubularhousing a conduit extending from the exterior to the interior of theboat, a flange carried by the plate adjacent the mouth of thedisplacement member, and a sleeve within the tubular housing supportedby the said flange, the sleeve forming with the tubular housing, asleeve valve for controlling the passage of water through the conduitformed by the displacement member and the tubular housing.

7. An automatic boat bailer including in combination an intake memberadapted to be positioned within the hull of a boat and a hollowdisplacement member adapted to de pend from and be positioned below thebot-' tom of the said boa-t,the said hollow displacement member beingcurved upwardly and forwardly to a knife edge.-

' 8. An automatic boat bailer including in combination a plate adaptedto be fastened to the bottom surface of a boat, a valved intake portionprojecting upwardly from the said plate within the hull of the saidboat, and a hollow displacement member depending from said plate, thesaid hollow displacement member being provided at its forward end with aknife edge. i i

9. In an automatic boat bailer, the combination with a plate adapted tobe fastened tothe bottom surface of a boat, of 'a hollow displacementmember depending from said plate, astubular casing projecting upwardlyfrom said plate provided with ports within the hull of said boat, and avalve closing the said ports, the said valve being provided with aportion adapted to shear ofl' anyforreign matter that might collect inthe said valve casing.

y 10. In an automatic boat bailer, the combi- I nation with a hollowdisplacement member adapted to depend from the bottom of a I boat, of atubular casing adapted to project upwardly within the hull of the saidboat, the saidtubular casing being provided With lateral ports, and arotary valve for closing the saidports, the said valvehaving edgeportions adapted to shear off any foreign matter that might collect inthe said valve casing.

11. An automatic boat bailerincluding in combination, a valve casingadapted for positioning within the hull of a boat, a hollow displacementmember depending from said valve casing and adaptedto bepositioned'below the bottom surface of the boat, the said hollowdisplacementmember being stream lined and being provided witha'relatively large opening at the rear thereof, and a flap valve of anarea substantially equal to the opening in the said displacement member,closing the said opening.

In testimony whereof I aflix my signature.

HAROLD L. BALDXVIN.

